Flycheck

Flycheck is an on-the-fly syntax checking extension for GNU Emacs. It integrates with various external linting and static analysis tools to provide immediate feedback on code quality and potential errors directly within the Emacs editor.

It is designed for developers and programmers who use Emacs as their primary code editor. Flycheck helps identify syntax errors, style violations, and other code issues as they type, supporting a wide range of programming languages and development workflows.